[HADOOP-1276] TaskTracker expiry interval is not configurable

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.13.0

Environment

all

• Assignee: Arun Murthy
• Reporter: Alejandro Abdelnur
• Created: 20/Apr/07 05:38
• Updated: 08/Jul/09 16:52
• Resolved: 07/May/07 20:15

Description

The tasktracker expiry interval is hardcoded to 10 mins with the MRConstants.TASKTRACKER_EXPIRY_INTERVAL constant.

For small clusters, running small jobs, this interval is too high.

Making it configurable it would require:

• Introducing a 'tasktracker.expiry.interval' property with default value of 10 mins.
• Load the property in the JobTracker
• Change the 5 usages of the constant by a property in the JobTracker
• Remove the constant from MRConstants
• add default value to the hadoop-default.xml file